M_ID,M_NAME,DEPT_ID,START_DATE,END_DATE,Salary
M001,Richa,D001,27-Jan-07,27-Feb-07,150000
M002,Nitin,D002,16-Feb-07,16-May-07,40000
M003,AJIT,D003,8-Mar-07,8-Sep-07,70000
M004,SHARVARI,D004,28-Mar-07,28-Mar-08,120000
M005,ADITYA,D002,27-Apr-07,27-Jul-07,40000
M006,Rohan,D004,12-Apr-07,12-Apr-08,130000
M007,Usha,D003,17-Apr-07,17-Oct-07,70000
M008,Anjali,D002,2-Apr-07,2-Jul-07,40000
M009,Yash,D006,11-Apr-07,11-Jul-07,85000
M010,Nalini,D007,15-Apr-07,15-Oct-07,9999
tail -10 Joining_date.txt|awk -F\, '{print $1,$2,$3,$4,$5|("sort -t, -M");$6} '
预期yields
M001,Richa,D001,27-Jan-07,27-Feb-07,150000
M002,Nitin,D002,16-Feb-07,16-May-07,40000
M008,anjali,D002,2-Apr-07,2-Jul-07,40000
M009,Yash,D006,11-Apr-07,11-Jul-07,85000
M005,ADITYA,D002,27-Apr-07,27-Jul-07,40000
M003,AJIT,D003,8-Mar-07,8-Sep-07,80000
M010,Nalini,D007,15-Apr-07,15-Oct-07,9999
M007,Usha,D003,17-Apr-07,17-Oct-07,70000
M004,SHARVARI,D004,28-Mar-07,28-Mar-08,120000
M006,Rohan,D004,12-Apr-07,12-Apr-08,130000